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See Chinese contents: GB/T 38894-2020 GB/T 38894-2020: Non-destructive testing--Electrochemical testing--General principles
This standard stipulates the general principles of non-destructive electrochemical testing such as selective electrodes, electrochemical impedance, multiple potential scanning for metal materials and products, as well as steel in infrastructure. This standard applies to non-destructive testing of the corrosion state, corrosion tendency and corrosion rate of metal equipment and components in the service environment.
